Polydimethylsiloxane cas no

Some substance identifiers may have been claimed confidential, or may not have been provided, polydimethylsiloxane cas no, and therefore not be displayed. More information about the EC Inventory can be found here.

The PhEur 6. It contains not less than Simethicone occurs as a translucent, gray-colored, viscous fluid. It has a molecular weight of 14 —21 Highly stable over a broad pH range.

Polydimethylsiloxane cas no

Polydimethylsiloxane PDMS , also known as dimethylpolysiloxane or dimethicone , is a silicone polymer with a wide variety of uses, from cosmetics to industrial lubrication. It is particularly known for its unusual rheological or flow properties. PDMS is optically clear and, in general, inert , non-toxic , and non-flammable. It is one of several types of silicone oil polymerized siloxane. Its applications range from contact lenses and medical devices to elastomers ; it is also present in shampoos as it makes hair shiny and slippery , food antifoaming agent , caulk , lubricants and heat-resistant tiles. For medical and domestic applications, a process was developed in which the chlorine atoms in the silane precursor were replaced with acetate groups. In this case, the polymerization produces acetic acid , which is less chemically aggressive than HCl. As a side-effect, the curing process is also much slower in this case. The acetate is used in consumer applications, such as silicone caulk and adhesives. Silane precursors with more acid-forming groups and fewer methyl groups, such as methyltrichlorosilane , can be used to introduce branches or cross-links in the polymer chain. Under ideal conditions, each molecule of such a compound becomes a branch point. This can be used to produce hard silicone resins. In a similar manner, precursors with three methyl groups can be used to limit molecular weight, since each such molecule has only one reactive site and so forms the end of a siloxane chain. Well-defined PDMS with a low polydispersity index and high homogeneity is produced by controlled anionic ring-opening polymerization of hexamethylcyclotrisiloxane. Using this methodology it is possible to synthesize linear block copolymers, heteroarm star-shaped block copolymers and many other macromolecular architectures.

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They can be manufactured as gels, resins, fluids, or elastomers, depending on the cross-linking characteristics. Toxicity testing using polydimethylsiloxane compounds on animals has found little, if any, harmful effects associated with chronic exposure. These tests include oral dosing and teratogenicity testing Cutler et al. Human health effects associated with silicone implants have been reported. Polydimethylsiloxane is the most prevalent silicone used medically and has been incorporated into many prostheses, including breast implants. Silicones are polymeric materials having silicon and oxygen on their composition. They are largely inert compounds usually heat-resistant, nonstick, and rubberlike.

Explore the versatility of Polydimethylsiloxane PDMS , its properties, applications, and environmental impact in our in-depth article. Polydimethylsiloxane, often abbreviated as PDMS, is a versatile and popular polymer used in a myriad of applications due to its unique properties. Primarily composed of silicon, oxygen, and carbon, this compound boasts remarkable flexibility and stability, making it a preferred choice in various industries. The basic structural unit of PDMS is a chain of — Si CH 3 2 -O- repeats, with silicon atoms linked by oxygen atoms — a structure that is essentially a silicon-oxygen backbone with methyl groups attached to the silicon. The dynamic nature of these silicone-oxygen bonds gives PDMS its renowned flexibility, while the non-reactive methyl groups contribute to its chemical inertness.

Polydimethylsiloxane cas no

Some substance identifiers may have been claimed confidential, or may not have been provided, and therefore not be displayed. More information about the EC Inventory can be found here. If the substance was not covered by the EC Inventory, ECHA attributes a list number in the same format, starting with the numbers 6, 7, 8 or 9. The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. If generated, an InChI string will also be generated and made available for searching. More help available here. CAS no.

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For medical and domestic applications, a process was developed in which the chlorine atoms in the silane precursor were replaced with acetate groups. Siloxanes and silicones, dimethyl. Elsevier BV. Antifoam A Concentrate is typically effective at ppm. Simethicone is a mixture of poly dimethyl siloxane and silica gel, known for their antifoaming properties. The date of the last update corresponds to the publication date of the InfoCard and not necessarily to the date in which the update occurred in the source data. This website uses cookies to ensure you get the best experience on our websites. Sinopharm Chemical Reagent Co,Ltd. CAS Number. View Technical Page. PDMS is being used in the making of synthetic gecko adhesion dry adhesive materials, to date only in laboratory test quantities. Siloxanes and Silicones, di-Me.

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Because of PDMS's chemical stability, it is often used as a calibration fluid for this type of experiment. Gedde; et al. This time-dependent elastic deformation results from the long-chains of the polymer. Sinopharm Chemical Reagent Co,Ltd. Overall PDMS has a low elastic modulus which enables it to be easily deformed and results in the behavior of a rubber. In stereo lithography SLA 3D printing, light is projected onto photocuring resin to selectively cure it. Chlorine -containing products Lindane. If the substance is covered by more than one CLH entry e. McGraw Hill Education India. Product data and descriptions listed are typical values, not intended to be used as specification. Shandong Xiya Chemical Co. Dimethicone Quassia toluidine Crotamiton.